Reasons for Reforms in the Russian Empire?

During the existence of the Russian Empire, a huge number of reforms took place. Each ruler carried out his own reformatory work, so it is necessary to clarify the specific period. For example, one of the most important reforms was the abolition of serfdom in the second half of the 18th century. This reform played an important role in society. Developed the reform in secret from the serfs and most of the feudal lords. This reform was extremely necessary for the development of the state, since all European states abandoned serfdom.